As for the civil binding the marriage contracted in the church needs some documents to be produces but if you are already civilly married everything will be easier. In addition to Catholic marriage, you can contract marriage under the chuppah or a Persian or Protestant marriage. There are lovely churches and chapels in Tuscany and many venues have their own private chapel where you can sometimes have your wedding. As for all the other beliefs you can do your wedding directly in the venue, while for a catholic church you must go to the church.
It all sounds so complicated, but I can assure you that under my guidance everything will be easier